Progressive dementia, which is dementia that gets worse with time, is the most common type. Five stages of progressive dementia have been outlined. They are part of the Clinical Dementia Rating (CDR), which professionals use to evaluate the progression of symptoms in patients with dementia. The five stages describe a patient’s ability to perform in six different areas of cognition and functioning: orientation, memory, judgment, home and hobbies, personal care, and community. The stages include early dementia, Moderate dementia, Advanced dementia, Test of dementia stages, Advances in research of dementia stages.